Pipe-coupling



{N0 Model.) r 2 Sheets-Sheet 1.

J. NUTTA-LL.

- PIPE COUPLING.

No. 303,231. Patented Aug. 5, 1884.

WITNESSES: f I INVENTOR N. "Jim. Mouhngnphtr. Waflhlkm. D. c.

(No Medal.) 2 Sheets-Sheet 2.

- J. NUTTALL.

PIPE COUPLING. No. 303,231. Patented Aug. 5, 1884 WITNESSES: INVENTOR I Joshu QHLZ AOVLL ATTOR N EY n. FETERi mwmm vm Wnlmgmm n c FATENT JOSHUA NUTTALL, ()F PlTTSBURG, PENNSYLVANIA.

PIPE-COUPLING.

SPECIFICATION forming part of Letters Patent No. 303,231, dated August 5, 1884.

Applicationfiled February 2, 1884.

w so as to bring the two sections of pipe and their collars into proper relation with each other.

To all whom it may concern:

Be it known that I, Josnua NUTTALL, a

citizen of the United States, residing at Pittsburg, county ofAlleghcny, State of Pennsylvania, have invented or discovered a new and. useful Improvement in Pipe-Couplings; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-dike letters indicating like parts- Figure 1 is a view in side elevation showing two sections of pipe united by my improved coupling. Fig. 2 is a similar View showing the couplingsleeve-in section. Fig. 3 is a longitudinal vertical section of two sections of pipe placed together preparatory to applying the coupling-sleeve. Fig. 4 is aview showing the inside of one section of the coupling-sleeve. Fig.5 is a side view of a spiral take-up spring.

Pipeeouplings of the class to which myimproved coupling pertains have consisted of a shoulder formed or secured on the ends of the pipesections and a sleeve or collar placed on the pipe back of the shoulder, said collar be-' ing provided with lugs, through which are passed bolts for drawing the collars against the shoulders and the ends of the two sections of pipe into close contact; but as these collars are formed of castiron, it frequently happens that the lugs are broken off in drawing the two sections of pipe together, orby the expansion of those sections after they have bee drawn together.

The object of my invention is to so construct the coupling that the lugs on the bindingsleeve will not besnbjected to the direct strain of drawing the sections together; and to this end my invention consists in the construction and combination of parts, all as more fully hereinafter described and claimed.

On the ends of two pipesections, A, I form or secure, in any suitable manner, the collars a. The outer edges of these collars are provided with double-spiral inclines Z), having their apices b on diametrically-opposite sides of the pipes. The meeting edges of these collars c are so formed as to lap by each other, as shown at c, and one of the collars is formed with a recess, (Z, into which a tongue, 0, on the eoliarof the adjoining section is adapted to fit,

- suring a tight joint at all times.

(No model.)

that is, with the apices I)" of one collar in line with those of the other collar-as cl earlyshown in Fig. 2.

The coupliiig sleeve D is made in any desired number of sections, preferably two, counterparts of each other, and provided with lugs f, by which to draw the two parts together; but in place of attaching one part of the sleeve to one section and the other part to another section, and depending on the lugs to hold the parts together, I so form each part as to extend from one section of pipe to the other, spanning the joint between the two scctionsof pipe, and form on the inner edges of the parts inwardly projecting flanges g, which are adapted to fit over the edges of the collars e on the pipe-sections. These flanges g are spirally inclined on their opposing faces 71., similar to the inclines b of the collars a.

v To join two sections of pipe, the sections are placed together as shown in Fig. 2, the tongue 6 on one fitting into the recess (Z on the other. The parts of the sleeve D are then so adjusted in place as to bring the apices of the inclines b at the lowest point of the inclines h of the sleeve. The boltl is then passed through the lugs f, and the two parts of the sleeves are drawn together by the nuts on. As the two parts of the sleeve are drawn together, the inclines of the flange g slide over the inclines of the collar a, and thereby tightly draw the two sections together.

It will be observed that in my coupling the direct strain of drawing the sections of pipe together is not borne by the lugs, but by the body of the coupling where it is strongest, and that the strains due to expansion are alsoborne by the same part. tubber or steel springs m, Fig. 5,, may be placed between the bolt-head and the lug, which will allow the parts of the sleeve to separate, to compensate for expansion, and will. draw the parts together when the pipes contract, thereby in- In placing the two sections of pipe together a lead washer, 0, or any other suitable packing, is placed between their meeting faces to pack the joint.

In place of having the outer edges of both of the collars inclined, as at I), only one of said collars may be so inclined, the outer edge of the other collar being made straight, as indi cated by dotted line 8, Fig. 2. -In that case the inner face of only one of the flanges g of the sleeve would be inclined, the inner surface of the other flange being formed straight, as indicated by dotted line 8, Fig. 4. I prefer, however, to form inclines 011 both collars and flanges, as in such construction thestrain of tightening the joint is equally borne by each, and by inclining or beveling both the collars and flanges I obtain an equal bearingsurface entirely around the pipe.

I claim herein as my invention 1. The pipe-sections A, provided with collarsat their ends, in co aibination with the sectional sleeve D, having inwardly-projecting flanges, said sections being adapted to be drawn together at their adjoining ends, substantially as set forth.

2. I11 a pipe-coupling, the sectional sleeve D, provided with flanges g, spirally inclined, as described, 011 their interior faces, in combination with collars a, correspondingly inclined on spondingly constructed at their inner edges,

whereby said pipesections may be drawn into close contact when the sleeve-sections are closed around the same, substantially as set forth.

In testimony whereof I have hereunto set my hand.

JOSHUA NUTTALL.

Witnesses:

R. H. WVHITTLEsEY, O. M. CLARKE. 

